in flink-connector-cassandra/src/main/java/org/apache/flink/connector/cassandra/source/CassandraSource.java [162:172]
public SourceReader<OUT, CassandraSplit> createReader(SourceReaderContext readerContext) {
return new CassandraSourceReaderFactory<OUT>()
.create(
readerContext,
clusterBuilder,
pojoClass,
query,
keyspace,
table,
mapperOptions);
}